Phosphorus dynamics mediated by bagasse, press mud and rice straw in Inceptisol of North India

Abstract

An incubation experiment was conducted to investigate the effect of organic residue (OR) on release of oxalate and silicate ions, available phosphorus (P) and P buffering capacity in soil. The OR that consisted of a 1:1:1 mixture of bagasse, press mud and rice straw applied as three doses, viz. 0, 2.5 and 5 g kg-1 soil. Two doses of P as 0 and 10 mg P2O5 kg-1 of soil were also applied. During incubation the oxalic acid concentration increased with increasing OR application from 30 to 48.2 mg kg-1 at one-year time interval. Silicate ions and available P were significantly affected by OR, P levels and time intervals. Phosphorus buffering capacity remained more or less constant by the application of OR and P levels, but was significantly affected by time interval. The application of OR to soil improved the P dynamics and availability